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Three-dimensional vapor growth mechanism of carbon microcoils

Published online by Cambridge University Press:  31 January 2011

Xiuqin Chen ,
T. Saito ,
M. Kusunoki  and
S. Motojima
Xiuqin Chen
Affiliation:
Department of Chemical Engineering, Huaqiao University, Fujian 362011, People's Republic of China
T. Saito
Affiliation:
Japan Fine Ceramics Center, 2–4–1 Mutsuno, Atsuta-ku, Nagoya 456–8587, Japan
M. Kusunoki
Affiliation:
Japan Fine Ceramics Center, 2–4–1 Mutsuno, Atsuta-ku, Nagoya 456–8587, Japan
S. Motojima
Affiliation:
Department of Applied Chemistry, Faculty of Engineering, Gifu University, Gifu 501–1193, Japan
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Abstract

Carbon microcoils were grown by the Ni-catalyzed pyrolysis of acetylene. The growth patterns and the tip morphologies of the carbon coils are examined in detail, and a growth mechanism is proposed. Basically, six thin fibers grew from a Ni catalyst grain during the initial growth stage immediately followed by the coalescence of the four fibers to form two fibers and then forming double-helixed carbon coils. A small amount of S and O, as well as C and Ni, was observed on the periphery of the cross section of the Ni catalyst grain. On the other hand, S and O were not observed in the central part. The driving force of the coiling of the straight fibers to form carbon coils is considered to be the strong anisotropy of the carbon deposition between different crystal faces.

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Articles
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Journal of Materials Research , Volume 14 , Issue 11 , November 1999 , pp. 4329 - 4336
Copyright
Copyright © Materials Research Society 1999

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References

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